Most of what you'll find is .156. Earlier Bally machines use .100.

Pinball Life carries this, which is nice:
http://www.pinballlife.com/index.php?p=product&id=1642

If you want to crimp the ends on (I prefer doing it that way), get the "trifurcon" pins.

The widest I think I've come across is 15 pins. I tend to keep a lot of sizes on hand, but you can get away with having some more specific plugs. 6 Pin, 9 Pin, 15 Pin get used a lot for power. They connectors are fairly easy to cut. I've often used a bigger plug and cut it down to the right amount of pins.

Make sure you get the correct keying plugs also.

You'll also want to get some 6 and 12 pin .093 connectors. Those burn a lot on System 11 power supplies.

Sorry for being sketchy, this is just a stream of consciousness.

I've had at least half a dozen mystery problems get fixed by rebuilding the connectors.